2000 Volvo C70

After replacing the head gasket and flywheel my 2000 Volvo C70 Turbo cranks, tries to start but won't. There is spark. The timing is correct. I pulled off the fuel rail and the injectors fire two to four times each and then stop. If I turn the key back and do it again, it repeats. Injectors shoot out fuel a few times and as the car continues to crank, they cease to fire any more fuel. Any ideas?

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Friday, October 1st, 2010 AT 11:59 AM

11 Replies

WRENCHTECH

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Is the spark doing the same thing as the injectors?

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Friday, October 1st, 2010 AT 12:09 PM

TERREONE

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There is continous spark. Only the injectors squirt gas for 4 or 5 cycles (4 or 5 times each) and then they just stop squirting fuel. The is spark continous. I have replaced the crankshaft sensor.

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Saturday, October 2nd, 2010 AT 4:57 PM

WRENCHTECH

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I would try unplugging all the injectors and use a noid light in one of them to see if it changes anything to indicate an shorted injector causing the problem.

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Saturday, October 2nd, 2010 AT 5:00 PM

TERREONE

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Even is all 5 injectors are firing at one point? All 5 take their respective turns for a few times each and then none work.

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Saturday, October 2nd, 2010 AT 5:23 PM

WRENCHTECH

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But you don't know if one shorted injector is pulling the power supply down.

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Saturday, October 2nd, 2010 AT 5:26 PM

TERREONE

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OK, I'll try it. At hti point I'll try anything. Since I don't have a 'noid' lite or know what it is, can I simply take turns disconnecting one injector at a time?

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Saturday, October 2nd, 2010 AT 5:29 PM

WRENCHTECH

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No, you can buy a noid light at most any auto parts store for under $10.
How do you know that your losing injector pulse if you don't have a noid light?

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Saturday, October 2nd, 2010 AT 5:32 PM

TERREONE

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By the way, each and everytime I turn the key back and try to restart I get all injectors firing again---and then stopping again.

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Saturday, October 2nd, 2010 AT 5:33 PM

TERREONE

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I have pulled the entire rail our and allow them to fire into a container. I can see them squirting.